The centrality of the land of Israel is a basic tenet of Jewish thought. Our Sages note that mitzvot performed outside the land of Israel are little more than practice (see Rashi, Devarim 11:18)—not unlike spring training, which is necessary to get in shape for the regular season, but has no independent meaning.
“In ten utterances did G-d create the world” (Avot 5:1). It is thus not surprising that many see man’s ability to speak as the clearest manifestation of the Divine image with which we were created.
"G-d spoke to Moses, saying: Take revenge for the Israelites against the Midianites. Then you shall die and be gathered to your people" (31:1-2).
“And Elazar the priest said: This is the law of the Torah, which the Lord commanded Moshe” (Bamidbar 31:21). The Torah goes on to describe the laws of kashering utensils, laws that were pertinent in light of the spoils captured by the Israelites in their war with Midian.
Our Sages, quoted by Rashi, were perplexed as to why Elazar and not Moshe gave this series of laws, especially as the Torah tells us it was Moshe whom G-d had commanded regarding these laws.